2532 papers
Quantum gravity represents the frontier where the very large meets the very small, attempting to unify Einstein's theory of gravity with the strange rules of quantum mechanics. This field explores the fundamental fabric of spacetime, seeking to understand how the universe behaves at its most extreme scales, from the heart of black holes to the moment of the Big Bang. Because these concepts often involve complex mathematics, they can feel distant to non-specialists, yet they hold the key to a complete picture of physical reality.
At Gist.Science, we bridge this gap by processing every new preprint in this category directly from arXiv. Our team provides both plain-language explanations and detailed technical summaries for each paper, ensuring that groundbreaking research is accessible to everyone, from curious students to seasoned researchers. Below are the latest papers in quantum gravity, offering fresh insights into the nature of our cosmos.
This paper demonstrates that dyonic black hole spacetimes in a quasitopological non-linear electrodynamic field theory can support massive self-gravitating thin shells in static equilibrium at discrete, universal radii where the derivative of approaches zero, regardless of the central object's mass.
This paper investigates the thermodynamic and structural consistency of quantum-improved charged black holes with scale-dependent couplings, revealing that arbitrary radial dependencies for couplings are thermodynamically permissible while requiring specific constraints on the Newton coupling to reconcile equation and action levels, and suggesting that such quantum modifications may drive early universe isotropization.
This paper investigates the viability of anisotropic Thurston spacetimes as a background model for the universe by deriving and analyzing the specific temperature and polarization quadrupole signals they would imprint on the Cosmic Microwave Background, aiming to isolate these geometries through their unique Stokes parameter patterns.
This paper investigates static spherically symmetric Kundt vacuum solutions in quadratic and six-derivative gravity, characterizing their curvature singularities and demonstrating that, unlike in Einstein gravity, specific higher-derivative models admit globally smooth gravitational wave solutions on these backgrounds.
This paper demonstrates that the Kerr-Schild single-copy framework reveals a structural equivalence between the thermodynamic Smarr formula for static, spherically symmetric black holes and Gauss's law, while also showing that the thermodynamic pressure-volume term in asymptotically anti-de Sitter spacetimes arises naturally from gauge-theoretic background subtraction.
This paper demonstrates that while the massive Hellings-Nordtvedt theory's asymptotic vacuum structure restricts viable solutions to specific single-coupling sectors, the sector uniquely supports asymptotically flat Schwarzschild metrics with nontrivial vector fields, offering a viable framework for studying compact objects that satisfy weak-field constraints while exhibiting significant strong-field deviations from general relativity.
This paper presents the first wide parameter-space search for continuous gravitational waves from unknown neutron stars in binary systems using advanced detectors, covering frequencies above 520 Hz and orbital periods under 3 days, which yielded no detections but established the most stringent constraints to date on signal amplitudes, ellipticities, and r-mode amplitudes for such sources.
This paper demonstrates that a conformally coupled scalar field with a mass of approximately $10$ can drive both primordial inflation and current cosmic acceleration through its regularized vacuum stress tensor, suggesting a shared quantum origin for these phenomena, whereas a minimally coupled scalar field fails to serve as either.
This paper investigates Burgers-type fluid dynamics under gravitational fields by deriving perturbative expressions for the catastrophe time in both Newtonian and Schwarzschild spacetimes, demonstrating that the validity of the expansion is governed by a specific dimensionless parameter rather than local gravitational acceleration alone.
This paper investigates the decomposition of the second-order scalar self-force into conservative and dissipative sectors within a nonlinear scalar toy model, identifying multiple Hamiltonian-compatible definitions for the conservative component while noting that infrared divergences restrict the results to unbound scattering trajectories.